Disable remote shutdown on windows 8.1

i want to disable remote shutdown to prevent the timer (on my internet cafe) from shutting down a certain pc (obviously, that pc should not be shutdown... diskless setup). how?

Obviously, im improvising. the timer is on a netbook and i want client to use the server pc on a different windows 8.1 account (non-admin). Anyways, just focus on the above

You can change access to who can perform remote shut downs by changing the local security policy. However, only machine administrators have this right be default.

• From Start type Local Security Policy and it should pop as you type
• Expand Local Policies
• Select User Rights Assignment
• In the right pane, double click Force Shutdown from a remote system
• Select the users to have access (default is admin)
• Click Apply